Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
hanh vai » hanh vi, hanh tai, hanh van
tu sach » thu sach, su sach, te sach
cuu tre » cau tren, cau treo
hanh va » hang va, hanh vi
sach ho » sach hoi, sach ha, sach lo
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ho nang » thi nang, kha nang, cao nang
cua tre » cua te, cua triet, dua tren
ve nam » he nam, va nam, le nam

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ho nang xa hoi. hieu ve nam thuc va ((hanh vai) or (hanh va)) ((cuu tre) OR (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ho nang xa hoi. hieu ve nam thuc va ((hanh vai) OR (hanh va)) ((cuu tre) OR (cua tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ho nang xa hoi. hieu ve nam thuc va ((hanh vai) or (hanh va)) ((cuu tre) OR (cua tre))".
• Adding a wildcard symbol may retrieve word variants: tu sach ho nang xa hoi. hieu ve nam thuc va ((hanh vai) or (hanh va)) ((cuu tre) OR (cua tre))*.